Packing



Paiented Nov. 29, 1927.

UNITED s-rATi-:s'

las-1,277

PATENT oFFicE..

C ECILIR. HUBBARD, OF NEWARK, NEW YORK, ASSIGNOR TO THE GARLOCKPACKING COMPANY, OE PALMYRA, NEW YORK, vA CORPORATION OF NEW YORK.

rAcxING.

Application filed July 11, 1925. Serial No. 42,911.

This invention relates to improvements in cially adapted for heavy service duty and to stand up under relatively wide and sudden Variations of temperat-ure and pressure.

It is an object 'of the invention to provide a packing of relatively simple' and economical construction but of maximum durability, thereby -reducing the necessity of frequent replacements.

In the drawings illustrating the preferred form of the invention:

Figure 1 is a plan view of a perforated blank of material adapted for use in makl5 ing the core of a packing embodying the in- Vention.

' the same.

Fig. 3 is a view -in perspective illustrating the blank shown in Fig. 1 after it has been partly folded as a part ofthe process of making the core.

Fig. 4 is a viewy in perspective. illustrating the completed core, one end beingl indicated as having been bent to a form adapted for msertion in a stufling box. I

F ig. 5 is a View in perspective of a short length of completed packing of which the.

folded material of Fig. 4 is used as a core. y Flg. Q is a view in perspective of a short length of packing embodying the invention bent into the form of a gasket, a portion hthereof being removed in order to illustratek internal structure.

The invention herein disclosed and claimed, in its broadest aspect, comprises a packing 10 (Fig. 4) consisting wholly or in part of laminated material, the la-Ininations running lengthwise of the packing and hav- 40 ing spaced marginal interruptions of continulty preferably in the form of recesses 11 (Figs. 4 and 5) in portions of the laminations exposedin one vof its surfaces, the recesses in adjacent laminations being disposed in staggered relation. Preferably such laminated strip will be made of lead or other appropriatesoft metal and used as a core of a composite packing illustrated in Fig. 5 having an outer casing'12 of asbestos fabric or other suitable fibrous material.

In the form of the invention herein disclosed by way of illustration, the' packing strip 10 is produced from a relatively thin strip 13 (Figs. 1 and 2) of lead or other suitable material perforated as indicated at 14, the 'perforations being disposed in parallel roWs extending lengthwise of the strip.

This strip of material is then creased along parallel lines 15,' 15 and 16, v16, the latter being so disposed as to intercept the rows of perforations and the former so as to lie between the same. The parts of the creased strip are then folded upon themselves through the form indicated in Fig. 3 to the compact form illustrated' in F ig. 4. These operations may be performed by approv priate machinery constituting no part of Flg. 2 is a transverse sectional view of rows, as a result of which the recesses ln the strip of materia/l 4) will be like- Wise sta'ggered. This results in a very effective 'broken joint relation between the various folds the recesses in each of which lie between imperforate portions of the adjacent folds or laminations.

It Will be apparent thatL the invention need not necessarily belimited to the form herein disclosed comprising ak structure made from a single'sheet of material, peri forated and bent through the perforations'. It is merely essential that the laminated structure comprise a multiplicity of mutually Contacting layers of folded, thin, relatively' soft sheet metal/ -disposed edgewise with respect to the working surface of the 'pa'ckingg and that portions of the folded material be cut away of such form, size and location as to produce series of spaced marginal interruptions of continuity in staggered relation 'along the relatively thin elements of folded sheet material exposed at said Working surface.

In the preferred form herein disclosed,

the perforations are of diamond form havmg their longer axes disposed crosswise With respect to the lines 16, 16 along Which the ric or other suitable fibrous material in- Wardlf, placing the core of laminated material a ong thel meeting edges of i-the folded stri and then turning 'the margins of the fol ed strip into contact with the side surfaces of the mass of laminated material Which serves as a core. The various layers of the fibrous casing may be secured to each other and to the laminated core in any appropriate manner as by coating the surfaces with rubber cement prior to the folding operation.

The composite acking illustrated in Fig. 5 may be readily nt to any desired radius, as lclearly indicat in Fi 6. The notches 11 m the inner sur, a e of t e core are sli htly closed during the bending of the ac 'ng, this bending being facilitated by the lines o-f weakness at the base of the notched portions. The portions of the sheet material cut aivay to form t-he recesses should be of such size and form that the bending of the packmg to the curvature of the rod with which it is to be used will not be *prevented by a premature closing of the surface gaps before the desired degree of curvature has -been attained. The broken joint arrangement between the notchesv of adjacent laminatlons of the core enhances the effectiveness of the packing, since steam, gases or other fluid is prevented from passin from the notches o one fold to the notc es of 4 the next fold because of the intervening imperforate portions of the folds which are maintained under relatively high pressure ivhen the packing is held in compressed relatio'n between the walls of a stufling box or corresponding surfaces of the packed joint. The recesses or cavities in the exposed surface of the metal core form suitable and uniform containers for grease, graphite or other lubricants.

The invention is not intended to be limited to the specific form Which has been selected for purposes of illustration but should be regarded as including modifications and Variations within the scope of the appended claims.

What is claimed is: y

1. A packing comprising a'sheet of appropriate material having longitudinally disposed rows of Jerforations therein, said sheet being folded along lines some of which pass through said rows of perforations and thereby formed into a compact laminated mass having one surface provided with a series of spaced recesses separated by the folded portions of said sheet lying between said perforations.

2. A packin f,'substantially as delined by claim 1, of w ich the material used is an appropriate soft metal.

3. A packing, substantially as defined by claim 1, the material used being lead. v

4. A packing, substantially as definecl by claim 1, the perforations in the sheet being in the form of diamonds having their longer axes disposed crosswise of the folds, thereby forming V-shaped notches in the surface of the finished packing.

5. A packing, substantially as defined by claim 1, having the perforations of alternate rows in staggered relations whereby the recesses in the finished surface wwill also be staggered, the recesses of each fold lying between intervening imperforated portions of adjacent folds.

6. A packing, substantially as defined by claim 1, the sheet being folded alternately in opposite directions and having the alternate folds disposed between parallel rows of perforations through Which the intervenin folds are made.

A packing comprising a sheet of lead having longitudinall disposed rows of diamond-Shaped per orations, said sheet being folded alternately in opposite directions along parallel lines passing in alternation through and between said rows of perforations and thereby formed into a compact -laminated mass, the alternate rows of perforations being disposed in staggered relation With their longer axes crosswise of the folds, thereby forming V-shaped notches in one of the surfaces of the finished packing, the notches in alternate folds being vstaggered and lying between intervening imperforated portions of adjacent folds.

8. A packing, substantially as defined by claim 1, having a casin of fibrous material in which the laminate mass is embedded, said casing forming a backing and covering for all parts of said mass except the surface having recees therein Which is left exposed.

9. A laminated packing element compris- Contacting' ing a'multiplicity of mutuall layers of folded, thin, relative y soft sheet metal disposed edgewise With respect to its Working surface, said folded material having portions cut away of such form, size and location as to produce series of spaced marginal interruptionsl of continuity in staggered relation along the relatively thin elements of folded material exposed at said- Working surface.

10. A laminated packing element comprising a lnultiplicity of mutually Contacting layers of tliin, relatively soft sheet metal disposed edgewise with respect to its Working surface, said material having portions cut away of such form, size and location as to produce series of spar-ed; marginal interrnptions of continuity in staggered relation along the relatively tliin elements ot' heet material exposed at said working surace.

In testimony Whereof, I signed my name.

' CECIL R. HUBBARD.

have hereunto 

